Influence of fibers’ orientation angle on failure mechanism of glass fiber reinforced polymer composites

Zhou H W●Yi H Y●Xue D J●Duan Z Q●Zhang Ch H●MISHNAEVSKY Jr.L

Abstract

A scanning electron microscope(SEM) is employed to carry out an in-situ investigation of crack growth in unidirectional glass fiber-reinforced polymer(GFRP) composites under the different orientation angle of fibers. Defining the shear stress on fiber and the normal stress on matrix as a stress state of interface between matrix and fibers, the failure-induced stress components of generalized elements with 27.5% fibers in volume fraction are estimated analytically on the basis of the bridging model. Moreover, combining the crack propagation path with the fracture morphology in SEM photos, the mechanism of crack generation and crack propagation of GFRP material with different orientations of fibers are analyzed comprehensively. The results of analysis show that, with increasing of fiber orientation, the stress components caused crack generation of material develop from the maximum normal stress of matrix into the shear stress of interface. The propagation path of crack evolves from cracking of matrix controlled by the maximum normal stress of matrix into cracking of interface controlled by the shear stress of interface.

引用格式：

周宏伟, 易海洋, 薛东杰, 段志强, 张春花, MISHNAEVSKY Jr.L.. 纤维方位角对玻纤复合材料破坏机理的影响研究[J].中国科学:物理学 力学 天文学,2013,43(02):167-176. doi: 10.1360/132011-1237 (Zhou H W, Yi H Y, Xue D J, Duan Z Q, Zhang Ch H, MISHNAEVSKY Jr.L.. Influence of fibers’ orientation angle on failure mechanism of glass fiber reinforced polymer composites (in Chinese).Sci Sin-Phys Mech Astron, 2013,43(02):167-176. )

DOI: 10.1360/132011-1237

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http://en.cnki.com.cn/Article_en/CJFDTotal-JGXK201302010.htm